"Meteorological Department" is the translation of this term. The second announcement warns of heavy to very heavy rain. It lists the provinces affected and notes the possibility of flash floods and forest runoff.
Date: 27 August 2026 GMT+7Meteorological DepartmentAnnouncement regarding "Heavy to very heavy rain in upper Thailand" The second announcement (No. 169/2569) covers the period from 29 August to 2 September 2026. It states that Thailand will experience increased rainfall with heavy to very heavy rain in some areas, especially in the upper northern region, upper northeastern region, the eastern part, and windward areas of the southwest monsoon. This is due to a monsoon trough moving across the north and upper northeast into a strong low-pressure area over northern Vietnam and the Gulf of Tonkin, combined with a fairly strong southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand.
Residents in these areas are advised to beware of dangers from heavy to very heavy rain and accumulated rainfall, which may cause flash floods and forest runoff, especially in hillside areas near waterways and low-lying areas. Avoid traveling through frequently flooded routes, particularly lowlands prone to short-term waterlogging.
The upper Andaman Sea will have fairly strong winds with waves 2-3 meters high; in areas with thunderstorms, waves may exceed 3 meters. The lower Andaman Sea and upper Gulf of Thailand will have waves around 2 meters high, increasing to over 2 meters where thunderstorms occur. Mariners in the Andaman Sea and Gulf of Thailand should navigate cautiously and avoid sailing in thunderstorm areas. Small boats in the upper Andaman Sea are advised not to depart during this period.
For safety and to reduce potential impacts, people are advised to plan their activities and travel carefully during this time. They should follow updates from the Meteorological Department via its website http://www.tmd.go.th or call 0-2399-4012-13 and 1182, available 24 hours.
Date: 29 August 2026 GMT+7
Date: 30 August 2026 GMT+7
Date: 31 August 2026 GMT+7
Date: 1 September 2026 GMT+7
Date: 2 September 2026 GMT+7
